Journal
OPTICS LETTERS
Volume 40, Issue 3, Pages 399-402Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.40.000399
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Funding
- National Research Foundation of Korea (NRF) - Ministry of Education, Science, and Technology [2011-0022830]
- National Research Foundation of Korea [2011-0022830] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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A simple method for generating a Laguerre-Gaussian (LG) mode optical vortex beam with well-determined handedness in a single-frequency solid state laser end-pumped by a ring-shaped pump beam is reported. After investigating the intensity profile and the wavefront helicity of each longitudinal mode output to understand generation of the LG mode in a Nd:YVO4 laser resonator, selection of the wavefront handedness has been achieved simply by inserting and tilting an etalon in the resonator, which breaks the propagation symmetry of the Poynting vectors with opposite helicity. Simple calculation and the experimental results are discussed for supporting this selection mechanism. (C) 2015 Optical Society of America
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